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    • Workers laying concrete
    Rights: WSDOT Creative Commons Attribution-NonCommercial-NoDerivs 2.0 Generic Published 25 September 2012 Size: 160 KB Referencing Hub media

    Cement is a key ingredient of concrete, huge volumes of which are poured each day to serve as roading, foundations, structural beams and columns.

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      ARTICLE

      Limestone uses

      The calcium carbonate content of limestone rocks has been used from the earliest civilisations, dating back to 14,000 BCE, to its extensive use in modern times. It is a valuable resource that ...

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      2. ACTIVITY

      Strength of sand and cement mixes

      In this activity, students mix different combinations of sand and cement with water. Small tiles of these combinations will be fashioned, left aside to cure and then tested for bending or ...

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